Will this fit on my 06' 21v?

I have a 2006 21v Launch and know a guy selling a 4 spkr/3light setup off his 2007 Supra.

1) I assume it will clamp easily to my tower since the clamps are already ready for a similar model tower?

2) How do you hook it up? Do you feed the wires through the tubular tower or run it along the outside and secure it somehow. I'm not sure how I would be able to feed it through the tower b/c there doesn't seem to be any holes left to feed them through.
Right now I have 2 Kenwood cans on top of my tower wired and working.
Could I just use those to connect the speakers?
Not sure how to get the lights ran to power - any thoughts?

Thanks for any help,

I also posted on my local board to see if anyone can help.

I know my wiring run to just the speakers has extra wires for lights. Worst case you can use the wires already in place as pull wires and pull the amount you need. Just ask what the clamp sizing is to make sure it will fit your tower.

tower should be the same... should fit fine...
if your tower is not prewired you will simply drill some holes and fish the wire through the tower and then it will go throgh the tower and come out down below one of the tower legs and be in your compartment by your amps and stereo. you will have to run the wire outside just where the cleat allows the tower to fold and then right back inside the tower again...